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Peculiarities of the superconducting gaps and the electron-boson interaction in TmNi<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math>B<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math>C as seen by point-contact spectroscopy
Point-contact (PC) investigations on the title compound in the normal and superconducting (SC) state (${T}_{\mathrm{c}}\ensuremath{\simeq}10.6$ K) are presented. The temperature dependence of the SC gap of TmNi${}_{2}$B${}_{2}$C determined from Andreev-reflection (AR) spectra using the standard single-gap approximation (SGA) deviates from the BCS behavior in displaying a maximum at about ${T}_{\mathrm{c}}/2$. …